public void RemoveRangeTest()
{
var source = new RangedObservableCollection <Person>(new[]
{
new Person {
Name = "tanaka1", IsRemoved = false
},
new Person {
Name = "tanaka2", IsRemoved = true
},
new Person {
Name = "tanaka3", IsRemoved = false
},
new Person {
Name = "tanaka4", IsRemoved = true
},
new Person {
Name = "tanaka5", IsRemoved = false
},
});
var filtered = source.ToFilteredReadOnlyObservableCollection(x => !x.IsRemoved);
var buffer = new List <NotifyCollectionChangedEventArgs>();
filtered.Is(source[0], source[2], source[4]);
source.RemoveRange(new[]
{
source[0], source[1], source[2],
});
filtered.Is(source.Last());
}
public void RemoveRangeRaisesCorrectCollectionChangedEventForNonExistentRemoves()
{
var collection = new RangedObservableCollection <int>();
collection.AddRange(ItemsToAdd);
collection.CollectionChanged += (s, e) =>
{
Assert.Equal(NotifyCollectionChangedAction.Remove, e.Action);
Assert.Equal(new[] { 1, 2, 3, 4, 5 }, e.OldItems);
Assert.Null(e.NewItems);
};
collection.RemoveRange(new[] { 1, 2, 3, 4, 5, 60, 70, 80, 90, 100 });
Assert.Equal(new[] { 6, 7, 8, 9, 0 }, collection.ToArray());
}
public void RemoveRangeRaisesCorrectCollectionChangedEvent()
{
var collection = new RangedObservableCollection <int>();
collection.AddRange(ItemsToAdd);
collection.CollectionChanged += (s, e) =>
{
Assert.Equal(NotifyCollectionChangedAction.Remove, e.Action);
Assert.Equal(ItemsToAdd, e.OldItems);
Assert.Null(e.NewItems);
};
collection.RemoveRange(ItemsToAdd);
Assert.Equal(new int[0], collection.ToArray());
}
public void RemoveRangeDoesNotRaiseCollectionChangedForMismatchingItems()
{
var collection = new RangedObservableCollection <int>();
collection.AddRange(ItemsToAdd);
var didTrigger = false;
collection.CollectionChanged += (s, e) =>
{
Assert.False(didTrigger);
didTrigger = true;
};
collection.RemoveRange(AlternateItemsToAdd);
Assert.False(didTrigger);
}
public void RemoveRangeRaisesCollectionChangedOnce()
{
var collection = new RangedObservableCollection <int>();
collection.AddRange(ItemsToAdd);
var didTrigger = false;
collection.CollectionChanged += (s, e) =>
{
Assert.False(didTrigger);
didTrigger = true;
};
collection.RemoveRange(ItemsToAdd);
Assert.True(didTrigger);
}